I continuously denied that you literally understood my quotes and I still do ("taking into account the deterrence means they both had" is the "precondition for the kind of agreements they could rationally pursue" (like the NTP and prior to that the Limited Nuclear Test Ban Treaty ). — neomac
You then make clear "that Ukraine doesn't have!"
It cannot be clearer that you are claiming the US and Soviet Union can make deals without trusting each other because of the nuclear weapons.
Saying "nuclear weapons" is a precondition to a deal about nuclear weapons, is a tautology. Obviously non-nuclear powers take into account the nuclear weapons of nuclear powers in making deals about nuclear weapons, as well. What else would you do? How do even propose a deal about nuclear weapons that does not take into account the nuclear weapons people do or do not have.
So either you're saying nothing at all, just that people have the idea of nuclear weapons in their head in making deals about nuclear weapons, or then you're saying something meaningful that would have been meaningfully connected to the point you are responding to: that actually having the nuclear weapons is "pre-condition" to making a deal about said nuclear weapons, as a substitute to the trust that gave rise to this discussion. A meaningful argument, just obviously wrong.
So what? There are three reasons your question is failing to take into account: — neomac
Again, reading comprehension.
We agree that the major reason for Russia to not reinvade is the cost of the war. For, if they could get Ukraine for free at no cost of inconvenience, I think we'd both agree they would do that.
So, the reason to not-invade Ukraine last February would be the cost of the conflict (sanctions, fighting and so on).
If there is a peace deal, the situation will be the same. The reason to enter a peace deal would be a bet that from Russia's perspective the cost of another war would outweigh the benefits and therefore they would not reinvade.
If we agree on this point, then we agree that this is in no war a guarantee.
If we also agree the US is not going to nuke Russia if they invade again (or at least not due to anything written on any piece of paper with the word "Ukraine" on it), then there is just no guarantees available. You can call something a guarantee; you can write down "the US will see to it that this deal is respected, that's a Uncle Sam guarantee!" but it's not a guarantee in any sense more than ornamentation added to the agreement for PR purposes. Wording and PR does have some consequence, it's not meaningless, just the US is not about nuke anyone simply due to PR optics of not-nuking them. They'll nuke Russia if they genuinely believe Russia is going to nuke them now or after some series of events they come to believe are inevitable. The decision to nuke Russia or not will have anything to do with any promises to Ukraine; I guarantee you that in the certainty sense of guarantee.
Now, you're whole list:
1. We are in the middle of the war so we don’t see the end of the war nor the full consequences of such war. The Soviet–Afghan War lasted 10 years, could anyone see the end of it and the following collapse of the Soviet Union while they were in the middle of it back then? No, because they didn’t happen yet.
2. Russia was complaining about NATO enlargement since the 90s, did Russia see NATO enlargement stopping for that reason? NATO/US can be as determined as Russia to pursue their goals in Ukraine at the expense of Russia. And since Russia, especially under Putin, took a declared confrontational attitude toward the hegemonic power, Russia made sure that NATO/US will deal with Russia accordingly as long as they see fit.
3. The end game for NATO/US involvement in this war doesn’t need to be to stop Russia or overturn its regime. But to inflict as much enduring damage as possible to Russian power (in terms of its economic system, its system of alliance, its capacity of military projection outside its borders, its its technology supply, its military and geopolitical status) to the point it is not longer perceived as a non-negligible geopolitical threat to the West. — neomac
Has nothing to do with my point. My point is simply that obviously Russia is willing to pay the cost of war with Ukraine under certain circumstances (such as circumstances that literally exist right now ... if they weren't willing, then they'd be withdrawing right now and the war would be over). Therefore, you could never reasonably assume such circumstances would not reemerge in the future regardless of any peace deal today. If there's no third party to keep Russia to its promise to not reinvade in the context of a peace deal (even ignoring the problem of why we'd believe such a third party would actually act), then there is simply nothing that can be remotely described as a guarantee of not being reinvaded available to Ukraine.
We may empathise why they would want such a guarantee in a peace deal, but it's simply not available. Therefore, if they want a peace deal, insisting on a guarantee in any meaningful sense (non-ornamental sense) is an irrational demand in negotiation, even more so an irrational precondition to negotiate in the first place.
What you list above has nothing to do with my basic observation that Russia is obviously willing to pay the cost of a war with Ukraine, has just happened and so may happen again. None of the third parties will be able to change this basic fact in any scribbling on paper process of whatever you want.
Of course, the alternative to a peace deal is more war, and in such a choice, as you say, maybe continued war is good for the West to "to inflict as much enduring damage as possible to Russian power".
However, if this damage is indeed significant, then it would be reason to assume that Russia would not restart a war that was so damaging. But, even if this is good for the West, is it good for Ukraine to be in a war forever with Russia and never make peace?
Since you can perfectly understand that there are implied and increasing non-negligible costs, especially when it’s matter of sunk costs and its psychological effects (https://en.wikipedia.org/wiki/Sunk_cost#Fallacy_effect), talking about actual willingness or hypothetical willingness in conjectured scenarios doesn't suffice to reason about this matter. And for that reason I’m not sure that Russia could rationally want to aggress Ukraine again. — neomac
Agreements are about future scenarios and contingencies. If Ukraine is demanding "guarantees" ... guarantees for what? Obviously not being invaded again. That's the scenario being negotiated.
If the US is promising something, and for that guarantee to be meaningful, then that means asking the question of "would the US do this thing even if it otherwise wouldn't want to?". A promise is only meaningful if it actually compels you to fulfil your promise in circumstances you don't want to anymore.
Now, the answer to the question "Would the US intervene again in Ukraine even if it really doesn't want to, for whatever reasons, just because it promised Ukraine as much?"
The answer is: No, it won't.
It will just forget about the agreement under such circumstances, but more likely just negotiate the agreement in such a way as to not really promise anything anyways (because it can, as it has the leverage vis-a-vis Ukraine, so there's simply no reason to make potentially unfulfilled promises anyways).
Therefore, the reason for Ukraine to believe Russia would not invade is not any promise by the US, but simply the cost to Russia of another war being higher than the benefits. If the current war really was premised on the idea that it would be over in 3 days, and has been a disaster ever since, then obviously Ukraine has demonstrated it takes more than 3 days to conquer, so Ukraine can sleep easy with that fact being clear.
Can the agreement commit US to actions that further increase the cost of another war beyond simply fighting with the Ukrainians? Obviously yes, just I honestly don't see any interventions the US would reasonably do in a second war they aren't already doing (again, actions under which Russia is currently willing to wage war). More important to the subject matter, even if the US made such commitments, if the question is asked if anything holds the US to their word about those commitments (promises by the US are a meaningful guarantee), the answer is obviously no.
So, to summarise, not only is "guarantees" not a reasonable precondition to negotiate in the first place, but there is no guarantee that Ukraine can actually secure in any meaningful sense. Placing the word "guarantee" or "guarantors" on the agreement would have very slight PR differences on how any events would actually play out (such as a "super sorry bro" rather than a mere "sorry bro").
Of course, if you want to argue that more war is good for the West and good for Ukraine, then you need not justify Zelensky's unreasonable conditions (to talk peace), but just defend the actual decision of wanting more war and ignore Zelensky' bullshit or then justify it as clever trolling of his partners, the media and social media. It's not like the Western media is able to rationally critique anything he says, so he could literally say anything.
However, this configuration of Zelensky dictating what's true and false to the Western media is one of invitation and not power. What the CIA gives with its right hand, it can take with its left.
Zelensky's credibility can be placed at any moment at any level the US administration wants, without Zelensky having any say whatsoever in the matter.
US administration wants the world to doubt what Zelensky knew or didn't know, intentions behind his statements, about any missiles hitting Poland, paint him as a dangerous fool, done. US administration wants Zelensky to talk peace even if he doesn't want to because there is no peaceful end to the war compatible with the survival of his political career, and controlling billions of dollars of free money with zero accountability and zero "collect taxes and pay debts" requirements nor any governance services quality expectations by anyone ... or opposition media ... or opposition parties ... and win oscars for the performance ... is a pretty nice life style, literally a 2 day operation to have Zelensky start talking peace rather than "we will defeat the Russians".